Guide for G27 (and other wheels) configuration

[RasmusP]

February 2024 Update:
Please don't read this thread. I know Google will show it, but it's old and filled with partly wrong information from me.
Just use my LUT package instead:
http://www.racedepartment.com/downloads/rasmusps-lut-guide-for-g27-29-and-dfgt.16799/



-------------- Don't read this! --------------

Older edit: After almost everyone prefers the LUT-Configuration, I created a Lut-only Thread with all my LUTs attached in a zip-file in the Download-Area here at Racedepartment.
Have a look:
http://www.racedepartment.com/downloads/rasmusps-lut-guide-for-g27-29-and-dfgt.16799/

Original post:
Hello everyone,
I know there are a lot of settings and guides online for "the perfect settings" but after I spent about 30 hours searching and trying, I really found MY best settings.
They are a combination of different guides (but with the "GAMMA-option" in use) that I will name right now and first:

Really nice and complete Guide on Assetto Corsa Forum
Reddit Thread where my adventure began (and where I got the Link above)
FFB Deadzone Fix Logitech G27
Guide for LUT Generator (can't recommend it but helped me understanding)

EDIT: I thought the LUT was what gave me my perfect feeling BUT IT WAS THE TYPE=GAMMA, not a LUT so I rewrote that whole Guide:

EDIT2: I found out how to write a LUT yourself so I did it and the result is something similar to the gamma-setting BUT less compressed, smoother middle-transition and therefore BETTER! Here is the link to the post if you don't want to scroll down: LINK

TL: DR Lines:
1. Adjust InGame-settings and Profiler

2. Open the controls.ini:
you find this ini in: "C:\Users\%username%\Documents\Assetto Corsa\cfg\controls.ini"
set MIN_FF=0.04, CENTER_BOOST_GAIN=1.3, CENTER_BOOST_RANGE=0.001

3. open the assetto_corsa.ini:
you find this ini in: "%...%\SteamLibrary\steamapps\common\assettocorsa\system\cfg\assetto_corsa.ini"
set ENABLE_GYRO=1, DAMPER_MIN_LEVEL=0.0, DAMPER_GAIN=0.7

4. open the ff_post_process.ini
you find this ini in: "C:\Users\%username%\Documents\Assetto Corsa\cfg\ff_post_process.ini"
set VERSION=1, TYPE=GAMMA, ENABLED=1, VALUE=0.5, CURVE=%doesn't matter%

5. HAVE FUN

6. additional:
- Logitech Profiler:
- overall: 100
- spring: 0
- damper: 0
- untick center spring, NO combined pedals, 900° rotation, TICK "allow game to adjust settings"

- AC InGame:
- Gain: 50% [depends on your wheel but for my G27 it is 50%. 75-125% InCAR]
- Filter: 0
- Min Force: 4%
- kerb, road, slip: 0
- understeer: untick
- Steering Settings: gamma 1, filter 0, sensivity 0!!

For those who want a detailed guide:

After I read very very much about all seen and all hidden settings in Assetto Corsa, I tried everything out, but one of these things was always bothering me:

1. you have a huge dead zone
2. your wheel oszillates
3. deadzone ok but no smooth transition at center
4. just too much force

The solution for me was the GAMMA-setting in the ff_post_process.ini!
Combined with the dampening-setting, the Gyro-setting, the min_force and the Center_Boost!
Short version of what this settings do:
To get rid of the Deadzone you need to combine the very little center-boost with the min-force. But then you will have a little bump in the middle because they have a "hard cut" at zero-force.
If you enable the GAMMA-setting this hard-cut will be transformed into a curve, just like the FFB-Output from Assetto Corsa will get compressed to a curve where little forces are boosted and the high forces are lowered.
Here are a few pictures of that:

1. Wheelcheck Result:
2. How the AC-FFB has to be alternated:

3. All these settings combined:

So you get rid of the deadzone but don't get an oscillating wheel! [Plus you feel more details.]

The Settings in detail:
1. controls.ini:
you find this ini in: "C:\Users\%username%\Documents\Assetto Corsa\cfg\controls.ini"

- Filter=0: This should eliminate FFB-spikes but for me it seems like it just kills little details but does not really smoothes out! So let it on 0!

- MIN_FF=0: That means, that the "zero force" is still zero force, theoretically it's THE setting to get rid of the deadzone BUT I experienced, that you need to get up to 17% for the G27 and then don't have a deadzone anymore but case 2.: your wheel oscillates.
If you go down to about 12% you have case 3.: the deadzone is still there, but little. Problem: it doesn't feel nice... 0 Force in the Deadzone and then BAM, FORCE.
My thought about that:
The "MIN FORCE" doesn't have a "Curve" for the lowest force. It just does a hard cut which ends up in my experienced results. (See Picture above: 3. combined)

- CENTER_BOOST_GAIN: In the Guide "FFB Deadzone Fix for Logitech G27 1.2" this setting is used.
Explanation: If you imagine the Wheel, the FFB begins at a little bit right and left from the center-> "deadzone". That is because the force that IS THERE, IN THE CENTER, is too low for your wheel.
This setting BOOSTS the FFB in the RANGE of "CENTER_BOOST_RANGE"

- CENTER_BOOST_RANGE: as mentioned, this is the range of the boost that applies on the FFB FROM THE CENTER. Theoretically you just need to "Boost the deadzone away". But this does not work, I tried EVERYTHING!! (combined with GAMMA this transforms to a "curve"!)

I combined this 3 settings in every possibility but you have always ONE problem: the "center transition" as in "you steer from left to right" gets a BUMP in the middle, because of the boost.
I tried to lower the boost, widen the range, give a little more MIN_FORCE. But nope, you always gets this unrealistic "center-bump". (so you need the GAMMA!)

I have to give the author much credit, it is a really nice setting but it's just not enough for me.

2. assetto_corsa.ini
you find this ini in: "%...%\SteamLibrary\steamapps\common\assettocorsa\system\cfg\assetto_corsa.ini"

- FF_SKIP_STEPS=0: If set to 1, you get half of the FFB-Refresh-Rate. So if you have a decent hardware, go with 0! Some people get an error on servers because their CPU is too weak. Then go with 1. It doesn't make a HUGE difference, but the more FF-Inputs, the better, right?

- ENABLE_GYRO=1: Honestly, I don't understand this settings but it smoothens the wheel without taking away important informations!
If you read about that setting: It is for Direct Drive Wheels as the Logitech G27 (not belt drive like Thrustmaster for example) and interprets "the wheel as a Gyro on certain speeds".
If your wheel is a little bit "shaky" overall or oscillates: go with 1!

- DAMPER_MIN_LEVEL=0.0: This means, that the InGame dampening (a few versions ago there was a slider?!) is OFF, when the Engine says the damper to be zero. If you increase this settings, your dampening will ALWAYS BE ON, even if the engine does NOT give the input for it.

- DAMPER_GAIN=1.0: That is simple. If the engine gives the input to dampen the FFB-Signal, it is indeed dampened. For my G27 I like it on 0.7 but if your wheel feels a little "numb" you can lower or even deactivate it. I find my wheel too shaky when on 0.0!
Sidenote: ALWAYS USE THIS SETTINGS FOR DAMPENING, NOT THE LOGITECH PROFILER DAMPENING!!!


3. ff_post_process.ini
you find this ini in: "C:\Users\%username%\Documents\Assetto Corsa\cfg\ff_post_process.ini"

- Version=1: No idea, just leave it!

- TYPE=GAMMA: I don't know how it works exactly but it is THE setting that got me stunning! I drawed a Curve about how it feels for me and it makes sense but honestly: no idea...
Here is the picture:

- VALUE=0.5: Well in one guide the author tells you "it is on 1 at mine, no idea, just leave it" BUT IT IS IMPORTANT!
It determines how strong the FFB gets "compressed". So on 1.0 it does NOTHING, on 0.1 you feel absolutely no details, it's like ultra-power-steering.
For me about 0.5 is the optimum for having details but no deadzone.
THIS IS THE SETTING THAT ELIMINATES MY DEADZONE AND LET IT FEEL REAL!
What is important here: you have to lower the global FFB in order to have "normal forces". The lower the value, the lower your global FFB! If you put VALUE=0.1 and global FFB on 100% you get broken arms for sure...

- CURVE=%doesn't matter, not active%": Well this is just the settings to take the correct LUT. BUT: I don't use a LUT and I can't recommend it with the G27. Tried it and it was just awful!
IF you want to activate a LUT you have to change TYPE=LUT (thanks to Ross Garland for giving me that info!)


Conclusion:
I know that was a lot and I know it's not perfect but maybe it will help you with your settings and increase the fun you have with Assetto Corsa.
I switched over from Project Cars but was so mad with my wheel that I thought about buying another one. The Deadzone was so annoying but the graphics, sound and gameplay were better and I really wanted that game to get working!

This is just a wrap up from other people's posts and guides but I didn't find a guide here, where you don't need to login to the Assetto Corsa Forum or even there, where all these settings are packed up so you can just read it down and get your settings.
And most importantly: I nowhere found any mention of this GAMMA-setting in the ff_post_process.ini so alone for that setting I wrote that all down.

I made this post to give all searching souls another thing to try and hope this makes even a few people happy

Let me know if it helped you!

Kind Regards,
Rasmus

 

[RasmusP]

Hello! Do you still think so?
I noticed that the generated loot helps me and many others to feel the weight of the car and the road surface in more detail.

Yes, I still think so.
But if you want to test anything from this thread, please instead go to my "Download" that's linked at the top of the very first post in this thread.
In general I still think that measuring how far a wheel can be thrown by a ffb pulse is not really corresponding to how a static ffb force feels when pressing against your hands.
When I change the "natural damper" in my csw 2.5, the wheelcheck curve gets a different shape.
But the ffb strength when holding the wheel tight stays exactly the same.
That was "proof" enough for myself, that you can't measure ffb linearity like that.
Instead you'd need to fix your rim to a luggage scale and send static ffb to the wheel from 1-100% and note down what the scale shows.

Anyway:
After multiple years, I came across people who told me that my LUTs would feel absolutely awesome but that something might be wrong so they sent screenshots of their settings.

Quite a few times I then saw that my LUT wasn't even applied so all they used was the stock default ffb.

Or they would test another LUT and tell me that it made a massive difference, just to find out that the LUT didn't apply and they were using the exact same FFB.

So the Placebo Effect is massive with FFB.

On the other hand, the LUT-Generator LUTs looks extremely similar to a normal Gamma-Curve + some minimum force.
So if you'd go into the settings and switch the "mode" from LUT to "GAMMA" and then use 1.5 as the gamma value + setting the minimum force to 10-13%, it would feel pretty identical.

What this does is lowering the ffb output for anything below about 50% ffb from the game and then having much more dynamic range for everything above 50%.
With 100% ffb gain, basically every corner is above 50% output from the game.

This means you have pretty soft ffb when not cornering (for example 50% becoming only 30%) but then you have 30-100% for cornering instead of just 50-100%.


Another view at this would be to compare the LUT Generator LUTs to using a stronger wheel.
When using something like the 8 nm CSL DD/CSW 2.5 or even stronger wheels, you'll always use only 60% gain or even lower to not have clipping during normal driving.

This also lowers the ffb when NOT cornering, while allowing for way more ffb when driving through something like Eau Rouge.

The big difference here is that this will give you, for example, 2 nm while not cornering and 7 nm while driving through Eau Rouge.

With the Logitech wheels, you'll get something like 0.5 nm while not cornering and only 2.5 nm through Eau Rouge.
And honestly, I can't feel anything below 1.5 nm.

So while it's true that you can feel more details and the load of the car with the LUT Generator LUTs, I couldn't feel anything when not cornering, which killed all immersion and fun.

But there are people who say the G27 would be "very strong" and almost too much to handle when using 100%. And for these people, the LUT Generator LUTs might feel awesome.


Note: I don't mean this in a negative way when people find the G27 to be quite strong and the LUT Generator LUTs awesome. When I started simracing, I also found my G27 to have plenty of force. It's nice, when your hands/arms are sensitive enough to feel the little forces of it!

When friends & family want to drive my CSW 2.5, I always scale down all ffb to 50% and limit the max ffb to 50% too.

 

[Sergyk]

where is attached zips? I need it

Yes, I still think so.
But if you want to test anything from this thread, please instead go to my "Download" that's linked at the top of the very first post in this thread.
In general I still think that measuring how far a wheel can be thrown by a ffb pulse is not really corresponding to how a static ffb force feels when pressing against your hands.
When I change the "natural damper" in my csw 2.5, the wheelcheck curve gets a different shape.
But the ffb strength when holding the wheel tight stays exactly the same.
That was "proof" enough for myself, that you can't measure ffb linearity like that.
Instead you'd need to fix your rim to a luggage scale and send static ffb to the wheel from 1-100% and note down what the scale shows.

Anyway:
After multiple years, I came across people who told me that my LUTs would feel absolutely awesome but that something might be wrong so they sent screenshots of their settings.

Quite a few times I then saw that my LUT wasn't even applied so all they used was the stock default ffb.

Or they would test another LUT and tell me that it made a massive difference, just to find out that the LUT didn't apply and they were using the exact same FFB.

So the Placebo Effect is massive with FFB.

On the other hand, the LUT-Generator LUTs looks extremely similar to a normal Gamma-Curve + some minimum force.
So if you'd go into the settings and switch the "mode" from LUT to "GAMMA" and then use 1.5 as the gamma value + setting the minimum force to 10-13%, it would feel pretty identical.

What this does is lowering the ffb output for anything below about 50% ffb from the game and then having much more dynamic range for everything above 50%.
With 100% ffb gain, basically every corner is above 50% output from the game.

This means you have pretty soft ffb when not cornering (for example 50% becoming only 30%) but then you have 30-100% for cornering instead of just 50-100%.


Another view at this would be to compare the LUT Generator LUTs to using a stronger wheel.
When using something like the 8 nm CSL DD/CSW 2.5 or even stronger wheels, you'll always use only 60% gain or even lower to not have clipping during normal driving.

This also lowers the ffb when NOT cornering, while allowing for way more ffb when driving through something like Eau Rouge.

The big difference here is that this will give you, for example, 2 nm while not cornering and 7 nm while driving through Eau Rouge.

With the Logitech wheels, you'll get something like 0.5 nm while not cornering and only 2.5 nm through Eau Rouge.
And honestly, I can't feel anything below 1.5 nm.

So while it's true that you can feel more details and the load of the car with the LUT Generator LUTs, I couldn't feel anything when not cornering, which killed all immersion and fun.

But there are people who say the G27 would be "very strong" and almost too much to handle when using 100%. And for these people, the LUT Generator LUTs might feel awesome.


Note: I don't mean this in a negative way when people find the G27 to be quite strong and the LUT Generator LUTs awesome. When I started simracing, I also found my G27 to have plenty of force. It's nice, when your hands/arms are sensitive enough to feel the little forces of it!

When friends & family want to drive my CSW 2.5, I always scale down all ffb to 50% and limit the max ffb to 50% too.

where is attached zips? I need it

 

[RasmusP]

where is attached zips? I need it

where is attached zips? I need it

RasmusP's LUTs for G27/29 and DFGT

Hi! After my G27 Guide seems to help a LOT of drivers to finally get satisfied with their Logitech wheel in Assetto Corsa but most of them preferring my LUT-Configuration, I decided to create a little Guide only with the LUT-Configuration. Easy...

www.racedepartment.com

Top right corner should be a red download button